<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Vue入门指南——响应式基础</title>
    <link rel="stylesheet" href="common.css" />
    <script type="importmap">
      {
        "imports": {
          "vue": "https://lib.baomitu.com/vue/latest/vue.esm-browser.js"
        }
      }
    </script>
  </head>
  <body>
    <div id="app">
      <p>
        <button v-on:click="increment">{{ count }}</button>
        <button v-on:click="testThis">不要使用箭头函数</button>
      </p>
    </div>
    <script type="module">
      import { createApp } from "vue";

      createApp({
        data() {
          return {
            count: 0,
          };
        },
        methods: {
          increment() {
            console.log(this);
            this.count++;
          },
          testThis: () => {
            console.log(this);
          },
        },
        mounted() {
          console.log(`${this.$data.count}`);
          this.count = 2;
        },
      }).mount("#app");
    </script>
  </body>
</html>
